On/off switch from server to clients live

I would like to set up a server where there is a GUI.VerticalSlider with two values - like on/off switch. When clients connect to this server, GUI buttons should be displayed. If server switch is ON, clients must have button A displayed and if server switch is OFF, clients must have button B displayed. There is a catch.. if a server changes switch at any time, clients buttons should change accordingly.

This is part of my code that is torturing me, I always get the same result no matter what status switch is in.

@RPC function whatIsMyLayout(res : int){ if (Network.isServer) { vSliderButtonValue = res; } }

function OnGUI() { var result:int;

if (Network.isClient) { if (!ButtonLayoutChecked) { networkView.RPC("whatIsMyLayout",RPCMode.Server, result); ButtonLayoutChecked = true; }

 if (result == 0) {
   if (GUI.Button(Rect(Screen.width-170,20,150,150), "ON")) {
     //Something
   }    
 } else {
   if (GUI.Button(Rect(Screen.width-170,20,150,150), "OFF")) {
     //Something
   }    
 }

} }

Can anyone please help me with this one? What am I doing wrong?